Roofing tile



Marci 7, 1939. F. GEORGI RooFING TILE Filed June 1, 1937 //W\JV/v u La'mum-1mmlunllnnlmumw Patented Mar. 1, 1939 I l Pari-:rvr oFFlcB ROOmG'TILE Fritz Georgi, Dresden, Germany Application .lune 1, 1937, SerialNo. 145,841 In Germany May 30, 1936 7 Claims.

(Cl. 10S-10) (Granted under the provisions of sec. 14, act of MarchnZ,1927; 357 0. G.

'Ihe present invention relates to a novel roofing tile.

A moulded tile already known has a longitudi- 4 nal troughdebouchinginto laterally divergent terminal channels adjacent thelowermost or drip edge of the tile. This trough, however, Weakensthetile precisely at the place at which external pressure is applied to thecovering surfaces, such tiles therefore usually breaking in thedirection of the longitudinal axis. Moreover, valley coverings cannot bemade with these rooing tiles; the weakened middle of the tile would beunsupported. Such tiles have usually to be made in ram presses and aretherefore more expensive. Further, it has been found that the watertends to collect in ridges at the cut lower edge of the tile, irregulardrip points being formed, accompanied by creeping of the water upwardson the underside of the tile.

An object of the present invention is to provide va at tile with swallowtail drip edge and at least one cross channel, in the vicinity of andapproximately parallel to said edge, indented in said upper side.

This novel tile is advantageous inasmuch as the water is led awaytowards the sides, without running towards the middle of the tile andthence creeping upwards on the undersurface. The advantages consist,therefore:

(1) In keeping the water away from the and underside;

(2) In increasing the useful life of the tile, as a result of the iirstadvantage;

joints (3) In the possibility of saving timber, since adequateprotection is afforded by a smaller lap, and consequently the'supporting laths can be more widely spaced than heretofore. Forexample, in the case4 of a single-lapped roof with a slope of 45, thespacing of the laths can case of a double-lapped roof, from 14.25 cm. to16.5 cm. The saving amounts to about 10-15% of timber, the saving oftiles and weight being 1012% in double-lapped roofs and about 15% insingle-lapped roofs.

(4) In the possibility of reducing the pitch of the roof as comparedwith that usual for plain tiles, because the draining action of thetiles according tothe invention is greater in the case of iiatter roofs.

Since, to the knowledge of the inventor, it has been established that,in the case of every known rooiing tile, the lowermost edge of the tileleads to the draining away of the rain water, through be increased from28 to 31 cm., and, in the Vthe formation of 4 water ridges, and thatundesired drip points may thereby occur in the immediate vicinity of theoverlapped joints, the object in view is to prevent the formation ofsuch ridges.

4 Moreover, in the event of unusually heavy downfall, the water may formridges, even in the case of simple channelled tiles, which ridges,although kept away from the joints, may always lead to an undesiredwetting of the overlap.

The keeping of the lowermost edge of the tile 10 free from such waterridges, directly over and beside the overlapped joints, is extremelyimportant.

The present invention includes the further feature of providing, abovethe apex of the main swallowtail channel, supplementary short channelsWith a similar course, so that the channels resemble a conventional pinetree -in design. The main channel is arranged so that its lower ends runparallel with the ends of the swallowtail drip edge and-terminatedirectly above the desired drip points, the supplementary channelshigher. up are shorter, and may terminate a few centimetres to right andleft of the apex. In this manner a better deection of the water isobtained, inasmuch as laterally deected streams of water are formed atthe short channels and are led, over the surface? of thetile, towardsthe drip points, so that the bottom edge of the tile remains practicallyfree from running water at the apex of the swallowtail and for a certaindistance to right and left of the apex-that is, therefore over the uppervisible'end of the overlapped joint--even under a very heavy downfall.

'Ihis result might, perhaps, also be attained, by a plurality ofcontinuous cross channels, but would have the disadvantage of wettingportions of the lateral joints.

Moreover, in the case of a'plurality of continuous channels, the tilewould be weakened at such portions of its covering surface as-are mostexposed to pressure stresses. Such'roong tiles could not be employed asvalley coverings,since, in such case, the tile must be divideddiagonally,

.and undesired and unsuitable water pockets Would then be formed at thejoints.

In the accompanying drawing, by way of ex. ample,

Fig. 1 shows one embodiment of the novel tile according to theinvention;

Figs. 2 to 6 represent other embodiments of the novel tile, Fig. 2 beinga plan of a tile with channels in the aforesaid pine tree relationship,

Fig. 3 a front elevation of the swallowtail end of the tile,

Fig. 4 a section along the line lII--IJI of Fig. 2.

Fig. 5 a plan of a tile with channels, theapices of which are offsetfrom the central longitudinal line, and

Fig. '6 a. plan of another tile in which thek channels lead fromdiilerent apices to common drip points.

In Fig. 1 the tile i is shaped in such a manner that the two bottom tips4 and 5 are formed, at

the sides, at a distance of half the width of the .tile from 'thelongitudinal median line. The tile `nels 40 and 4I, the apices of whichare offset are shown in Fig..5. The main channel 'l and supplementarychannels 42 and 43 of the tile in Fig.

6 are conuent at common drip points 44 and 45,

remote from the apices 46 and l1 of said supplementary channels Iclaim:-

1. A roong tile having a dat upper surface, a swallowtail drip edge anda cross channel indented in said upper surface in the vicinity of andapproximately parallel to said edge.

2. A roofing tile having a at upperl surface, a swallowtail drip edge,a-main cross channel indented in said upper surface adjacent andapproximately parallel to said edge, said channel extending from side toside of the tile, and at least one supplementary swallowtail channelin-v dented in said upper surface above said main channel.

3. A roong tile having a :dat upper surface..

a swallowtail drip edge, a main cross channel indented in said uppersurface adjacent and approximately .parallel -to said edge, said channelextending from side to side of the tile, and at least one supplementaryswallowtail channel indented in said upper surfaceabove said mainchannel, the apices of said drip edge and said main and supplementarychannels being located in the median longitudinal line of the tile.

4. A roong tile having a iiat upper surface, a swallowtail drip edge, amain cross channel indented in said upper surface in the vicinity of andsubstantially parallel to said edge, said channel extending from side toside of the tile, and a plurality of supplementary, short, swallowtailchannels'indented in said upper surface above said main channel, theapices of said edge and said main channel being located in the medianlongitudinal line of the tile and the apices of at least some of saidsupplementary channels being4 dented in said upper ,surface adjacent andsubstantially parallel to said edge, said channel ex'- tending from sideto side of the tile, and a plu. rality of supplementary, shortswallowtail channels indented in. said upper surface. above said mainchannel, the apices of said edge, said main channel and an uppermost oneof said supplementary channels being located in the median longitudinallineof the tile and the remainder of said supplementary channels beingsymmetrically offset from said line. w

- 6. A roofing tile having a fiat upper surface, a swallowtail dripedge, a main cross channel indented in said upper surface adjacent andsubstantially parallel to said edge, said channel extending from side toside of the tile, and at least one supplementary channel indented insaid upper'surface, the apices of' said edge and said -main channelbeing located in the median longitudinal line of the tile, the apex .ofsaid supplementary channel being located in said line above the apex ofthe vmain channel, and the ends of said supplementary channel beingconuent with the ends of said main channel at commondrip points at thesides of the*- tile.

, 7. A roonng tilehaving a swallowtail drip edge, and a narrow,swallowtail channel extending across its upper surface at a constant,short distance from said edge, said upper surface on both sides ofthe-channel, being plane. f

. FRITZ GEORGI.

